4166221535431 has 4 divisors (see below), whose sum is σ = 4263110408392. Its totient is φ = 4069332662472.

The previous prime is 4166221535321. The next prime is 4166221535477. The reversal of 4166221535431 is 1345351226614.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4166221535431 - 2⁹ = 4166221534919 is a prime.

It is a super-2 number, since 2×4166221535431² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 96888872917 = 4166221535431 / (4 + 1 + 6 + 6 + 2 + 2 + 1 + 5 + 3 + 5 + 4 + 3 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4166221535131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48444436416 + ... + 48444436501.

It is an arithmetic number, because the mean of its divisors is an integer number (1065777602098).

Almost surely, 2^{4166221535431} is an apocalyptic number.

4166221535431 is a deficient number, since it is larger than the sum of its proper divisors (96888872961).

4166221535431 is an equidigital number, since it uses as much as digits as its factorization.

4166221535431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96888872960.

The product of its digits is 518400, while the sum is 43.

The spelling of 4166221535431 in words is "four trillion, one hundred sixty-six billion, two hundred twenty-one million, five hundred thirty-five thousand, four hundred thirty-one".